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Sunflex SF20 - frameless glass sliding door system

The Sunflex SF20 all glass sliding door system, is completely frameless and provides uninterrupted clear views, excellent operating performance and noise reduction.

For use as an internal room divider, the system can also be used in a stand-alone external structure, such as balcony and patio enclosures or winter gardens.

Key features:

  • Minimalist designed sliding doors with no visible sight lines.
  • Energy-saving that also offers weather protection from the elements.
  • Wide variety of configurations.
  • Automatic opening and closing of slave panels when main sliding panel is operated.
  • Internal track drainage for cleaning and anti-slip floor track or flush track option.
  • Low maintenance and fully guaranteed.

Versatility in design

The panels slide horizontally to one or two sides. On opening and closing the first sliding panel and other sliding panels are automatically opened and closed.

Complete versatility is achieved with two, three, four or five track slide and guide rail.




Standard aluminium finishes

As standard we offer the choice of any RAL colour on this sliding door system in a semi-gloss finish, DB703 textured, DB703 smooth or silver anodised. Once we have prepared a quotation we are able to send colour samples for approval prior to progressing with your order. 

Special RAL colours

Over our standard range we are also able to offer the full RAL classic colour range. The range consists of over 200 colours which come in a matt, semi-gloss or full-gloss finish. The colours shown in the swatch will give an indication to the colour shade, however before progressing with an order we can provide aluminium samples for your approval.

Full RAL classic colour range for SF20 sliding door - IDSystems



RAL classic colour swatches - IDSystems

RAL swatches

RAL classic colour swatches can be purchased directly from us for £10.99 (including postage).

The full colour swatch is a great tool to allow you to choose the colour of your doors and windows to complement your internal decoration, external render, brickwork or other features within your project.

To order a RAL swatch you can make a card payment over the phone by calling us on 01603 408804. If you have narrowed down your choice we are able to send a colour sample for your approval when placing an order.


Glass options

8mm or 10mm Clear toughened glass as standard, you can also opt for tinted or obscured glass to increase privacy.




The SF20 all glass sliding system, is bespoke and manufactured to fit any size of opening.

Panels can be made up to a width of 1,600mm and a maximum height of 2,600mm, with up to five panels in each direction. Heights greater than this can be achieved, please contact our technical department for advice.


Sliding glass panels have been bonded and mechanically clamped with a slender bottom aluminium rail.



Designed primarily as an internal system, the SF20 as standard does not incorporate a lock. However, there is an option to add a locking mechanism to the lead panel both internally and externally if required.

Weather stripping

Each panel when closed overlaps the adjacent panels by 23mm, providing permanent ventilation and protection from the elements. Increased rain and wind resistance can be achieved as an option, by clamping vertical profiles on to the glass with brush piles.

The floor track with anti-slip coating, a flush track option is available so it can be recessed into the floor to provide a virtually unobstructed living space.

Operating system

A bottom running system ensures effortless movement of the sliding panels. The ball bearing running mechanism is concealed within the bottom rail limiting exposure to dirt and debris and provides quiet operation.

The ceiling track offers up to 20mm in tolerance while the bottom rollers can be adjusted in height by up to 5mm to allow for any inconsistencies and to compensate for structural variations.


As standard we offer the choice of any RAL colour in a semi gloss finish, DB703 textured, DB703 smooth or silver anodised. Other RAL colours (over 200 RAL colours) are available for a nominal charge. In addition you can specify whether a matt, semi-gloss or full-gloss level paint finish is required.

Various handle options exist depending upon personal preference.

Complete system

The SF20 glass sliding system can be complemented by most systems enabling a complete solution to any room, from side hung opening windows to folding doors.


Depending on specification 8mm or 10mm toughened safety glass, manufactured to BS EN 12600 standard can be used, this can be tinted or obscured if required.

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